What does 30 yuan mean when the postal service deducts the SMS fee?

30 yuan means that the post office charges users for short messages from 30 yuan. According to the query of China Post official website, users need to receive verification code, notification and other information through SMS when using some services of the post office. In order to provide these services to users, the post office needs to charge users a certain short message fee, and the short message fee is 30 yuan.